[Openmcl-devel] Unix signal handling
Scott L. Burson
Scott at sympoiesis.com
Tue Jul 6 23:59:50 CDT 2010
On Tue, Jul 6, 2010 at 9:18 PM, Gary Byers <gb at clozure.com> wrote:
> CCL's own signal/exception handlers go through a fairly strict protocol to
> try to ensure GC safety, and anything we do to support user-defined signal
> handlers would have to deal with similar issues in similar ways.
Okay, fair enough, but is there a possible synthesis here? What if we
had a vector of semaphores, and a generic signal handler in C whose
only action was to signal the corresponding semaphore? The Lisp-level
handler then runs in a separate thread that waits on the semaphore and
then calls the handler. The handler can interrupt some other thread
or do whatever else it wants.
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